LRT 750 Precision Reference Thermometer User Manual

1. Įvadas

The LR-Cal LRT 750 is a high-precision digital reference thermometer designed for checking and calibrating various types of thermometers. This system comprises a battery-powered digital handheld indicator and a pre-aged precision sensor, offering a wide temperature measurement range from -200°C to +450°C. It serves as a reliable comparison reference for temperature reading instruments, providing an accuracy of up to 0.03°C for precise comparison measurements.

2. Saugos informacija

Please read and understand all safety instructions before operating the LRT 750 thermometer. Failure to follow these instructions may result in injury or damage to the device.

• Do not expose the device to extreme temperatures outside its specified operating range.
• Venkite numesti įrenginį ir stipriai jį sutrenkti.
• Nebandykite ardyti ar modifikuoti termometro. Visus techninės priežiūros darbus patikėkite kvalifikuotiems darbuotojams.
• Ensure the probe is securely connected before taking measurements.
• Handle the probe with care, especially when measuring high or low temperatures, to prevent burns or frostbite.
• Saugokite įrenginį nuo stiprių magnetinių laukų.
• Naudokite tik nurodytą baterijų tipą ir įdėdami užtikrinkite teisingą poliškumą.

3. Pakuotės turinys

The standard package for the LR-Cal LRT 750 includes the following items:

• Adjusted, pre-aged precision probe
• Handheld digital indicator (adjusted to the connected probe)
• Baterijos
• Naudojimo vadovas (šis dokumentas)
• Protective plastic case
• Certificate of Calibration (factory or DAkkS, depending on order configuration)

This image displays the LR-Cal LRT 750 Precision Reference Thermometer system. The main handheld indicator unit is visible in the center, surrounded by custom-cut foam within a durable blue plastic carrying case. The precision probe is positioned alongside the indicator, ready for use. The foam inserts ensure secure transport and protection of all components.

4. Sąranka

4.1 Akumuliatoriaus įdėjimas

The LRT 750 is powered by batteries. To install or replace batteries:

1. Locate the battery compartment on the back of the handheld indicator.
2. Atidarykite akumuliatoriaus skyriaus dangtelį.
3. Insert the batteries, ensuring correct polarity as indicated inside the compartment.
4. Saugiai uždarykite akumuliatoriaus skyriaus dangtelį.

4.2 Zondo jungtis

The precision probe connects to the handheld indicator via a dedicated port.

1. Identify the probe input port on the bottom of the handheld indicator.
2. Align the connector of the precision probe with the input port.
3. Gently push the connector into the port until it is firmly seated. Do not force the connection.
4. Ensure the connection is secure to prevent inaccurate readings.

This image shows the LR-Cal LRT 750 handheld digital thermometer with its precision probe securely connected. The probe extends from the bottom of the main unit, which features a clear digital display and control buttons. This setup illustrates the device in an operational configuration, ready to take temperature readings.

5. Naudojimo instrukcijos

5.1 Įjungimas / išjungimas

• Norėdami įjungti įrenginį, paspauskite GALIA mygtuką. Ekranas įsijungs.
• Norėdami išjungti įrenginį, paspauskite ir palaikykite GALIA mygtuką, kol ekranas išsijungs.

5.2 Matavimai

1. Ensure the probe is properly connected and the device is powered on.
2. Insert the precision probe into the medium or environment whose temperature you wish to measure. Ensure the sensing tip of the probe is fully immersed or in good contact with the target.
3. Allow sufficient time for the reading to stabilize on the display. The response time (t90) is typically 12 seconds.
4. Read the temperature value displayed on the digital screen.

5.3 Display Interpretation and Functions

The digital display shows the current temperature reading. The LRT 750 also features several functions:

• Matavimo greitis: Can be set to "Fast" (4 readings/sec) or "Normal" (1 reading/sec).
• MIN and MAX values: Leidžia viewing of the minimum and maximum temperatures recorded during a measurement session.
• LAIKYTI: Įšaldo dabartinį rodmenį ekrane.
• VIDUTINIS: Calculates the average of readings over a period.
• NULIS: Resets the current reading to zero, useful for relative measurements.
• Integruoti: Real-time clock function.

5.4 Kalibravimas

The LR-Cal LRT 750 is a reference thermometer used for comparison measurements. It comes with a Certificate of Calibration (factory or DAkkS accredited). For maintaining its accuracy, periodic recalibration by a qualified laboratory is recommended. Refer to your calibration certificate for recommended recalibration intervals.

6. Priežiūra

Proper maintenance ensures the longevity and accuracy of your LRT 750 thermometer.

• Valymas: The device and probe can be cleaned by wiping them with a soft, damp cloth. Do not use abrasive cleaners or solvents. Ensure the device is powered off and disconnected from the probe before cleaning.
• Saugykla: When not in use, store the LRT 750 and its probe in the provided plastic case to protect them from dust, moisture, and physical damage. Store in a dry environment within the permissible storage temperature range of -10°C to +50°C.
• Baterijos keitimas: Replace batteries promptly when the low battery indicator appears on the display to ensure continuous accurate operation.

7. Problemų sprendimas

This section addresses common issues you might encounter with your LRT 750 thermometer.

8. Specifikacijos

Detailed technical specifications for the LR-Cal LRT 750 Precision Reference Thermometer:

This image presents the comprehensive specification sheet for the LR-Cal LRT 750. It details various functions such as measurement rate, MIN/MAX values, HOLD, AVERAGE, ZERO, and Integrate. Key performance metrics like measuring range (-200 to +450°C), accuracy (up to 0.03K), display resolution, and response time (12 seconds) are clearly listed. Environmental conditions, housing material, weight, and probe dimensions are also provided, along with order codes for different calibration options.

9. Garantija ir palaikymas

9.1 Informacija apie garantiją

The LR-Cal LRT 750 Precision Reference Thermometer comes with a vienerių metų garantija from the manufacturer. This warranty covers defects in materials and workmanship under normal use. It does not cover damage resulting from misuse, accident, modification, or unauthorized repair.

9.2 Pagalba klientams

For technical assistance, troubleshooting beyond this manual, or warranty claims, please contact LR-Cal customer support. Have your product model and serial number (if applicable) ready when contacting support.

For the most up-to-date contact information, please visit the official LR-Cal websvetainėje arba žr. kartu su pirkiniu pateiktus dokumentus.